Exam for students

Hello,

I really love your plugins, it’s a very great plugins that has it all.

I would like to have a setting in the form of an exam for students.

The exam will be in a way that the questions can only be attempted once, but before the students would have access to the “exam” questions, they would have scored a cumulative score/points by answering some questions (let’s call them tests). The students who scored a cumulative score of say 70% can only access the “exam” and if they don’t have up to the 70%, they can retake the tests.
Regards.